ARMY R36C Assault Rifle GBB (BK & SD)It is another variant of the standard MK36 rifle developed from the K (Kurz) model. “C” means “Compact” and has the shortest barrel in MK36 series. Also the handguard and rear stock were also shortened and replace the top rail handle with iron sights instead of the standard fixed carry handle with optics. It mainly used by special forces, law enforcement and PMC. Products link : http://airsoft.tiger111hk.com/advanced_search_result.php?keywords=ARM-GBB-R36